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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amounts of All Derivative Instruments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Economic undesignated hedges:    
Derivative Notional Amount [1] $ 208,020 $ 216,020
Forward Contracts [Member]    
Economic undesignated hedges:    
Derivative Notional Amount [1] 26,000 33,000
Nondesignated [Member] | Interest Rate Cap [Member] | Purchase    
Economic undesignated hedges:    
Derivative Notional Amount [1] 91,010 91,510
Nondesignated [Member] | Interest Rate Cap [Member] | Written    
Economic undesignated hedges:    
Derivative Notional Amount [1] $ 91,010 $ 91,510
[1]
(1) Notional amounts are presented on a gross basis with no netting of offsetting exposure positions.